US3974712A - Auxiliary brake lever - Google Patents

Auxiliary brake lever Download PDF

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Publication number
US3974712A
US3974712A US05/596,169 US59616975A US3974712A US 3974712 A US3974712 A US 3974712A US 59616975 A US59616975 A US 59616975A US 3974712 A US3974712 A US 3974712A
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US
United States
Prior art keywords
brake lever
cam
lever
housing
auxiliary
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US05/596,169
Inventor
Alan D. Kaufman
Arne M. Reistad, Jr.
David J. Wilke
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
PENNSYLVANIA WIRE ROPE CORP
Original Assignee
PENNSYLVANIA WIRE ROPE CORP
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by PENNSYLVANIA WIRE ROPE CORP filed Critical PENNSYLVANIA WIRE ROPE CORP
Priority to US05/596,169 priority Critical patent/US3974712A/en
Priority to CA234,546A priority patent/CA1039624A/en
Application granted granted Critical
Publication of US3974712A publication Critical patent/US3974712A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62L—BRAKES SPECIALLY ADAPTED FOR CYCLES
    • B62L3/00—Brake-actuating mechanisms; Arrangements thereof
    • B62L3/02—Brake-actuating mechanisms; Arrangements thereof for control by a hand lever
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/18—Mechanical movements
    • Y10T74/18888—Reciprocating to or from oscillating
    • Y10T74/1892—Lever and slide
    • Y10T74/1896—Cam connections
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/18—Mechanical movements
    • Y10T74/18888—Reciprocating to or from oscillating
    • Y10T74/18984—Inclined ramp
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/20—Control lever and linkage systems
    • Y10T74/20207—Multiple controlling elements for single controlled element
    • Y10T74/20256—Steering and controls assemblies
    • Y10T74/20268—Reciprocating control elements
    • Y10T74/2028—Handle bar type
    • Y10T74/20287—Flexible control element
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/20—Control lever and linkage systems
    • Y10T74/20207—Multiple controlling elements for single controlled element
    • Y10T74/20372—Manual controlling elements
    • Y10T74/20384—Levers
    • Y10T74/2039—Pair of levers

Definitions

  • a bicycle brake operating device having a main brake lever and an auxiliary brake lever wherein the auxiliary brake lever is operable independently of the main brake lever is known, as evidenced by U.S. Pat. No. 3,719,104 dated Mar. 6, 1973.
  • auxiliary brake lever of the present invention functions in a similar manner; however, it is characterized by its simplicity of construction, having few moving parts; thus, not likely to get out of order even after long and continued use.
  • the auxiliary brake lever of the present invention comprises, essentially, a cam surface provided on the housing of the main brake lever, and a cooperating cam follower surface provided on the hub of the auxiliary brake lever, the configuration of the cam surface being constructed and arranged whereby rotational movement of the auxiliary brake lever imparts axial movement to the lever hub to thereby apply a compressive force on the cable sheath, flexing the sheath to react against a normally taut flexible cable and move the cable along the sheath to apply the brake shoes to the rim of the bicycle wheel.
  • FIG. 1 is a side elevational view showing the main and auxiliary brake operating levers mounted in operative position on a bicycle handle bar;
  • FIG. 2 is an exploded perspective view showing the details of one embodiment of the cam configuration provided on the main brake lever housing and the cam follower configuration provided on the hub of the auxiliary brake lever;
  • FIG. 3 is a fragmentary, side elevational view, partly in section, showing the inoperative position of the auxiliary brake lever
  • FIG. 4 is a fragmentary, side elevational view, partly in section, showing the operative position of the auxiliary brake lever
  • FIG. 5 is an exploded, perspective view showing the details of another embodiment of the cam and cam follower configuration provided on the main brake lever housing and auxiliary brake lever hub, respectively;
  • FIG. 6 is a fragmentary, side elevational view, partly in section, showing the auxiliary brake lever embodiment of FIG. 5 in the inoperative position;
  • FIG. 7 is a fragmentary, side elevational view, partly in section, showing the auxiliary brake lever embodiment of FIG. 5 in the inoperative position.
  • a housing 1 is secured to the bicycle handle bar 2 by a suitable strap 3, the housing having the main brake lever 4 pivotally connected thereto as at 5.
  • the auxiliary brake lever 6 is rotatably mounted on the front or nose portion of the housing 1 and is operative to actuate the bicycle brakes, through Bowden cable 7, when moved in the direction of the arrows, to be described more fully hereinafter.
  • the location of the main brake lever 4 and auxiliary brake lever 6 relative to the handle bar 2 is such that the main brake lever is operable from the hand grips of the handle bar and the auxiliary brake lever is operable from the cross bar of the handle bar.
  • FIG. 2 The details of the auxiliary brake lever are shown in FIG. 2, wherein the nose of the housing is provided with an outwardly extending cylindrical sleeve 1a having a helical cam surface 1b formed on the outer peripheral surface thereof.
  • the cam surface 1b is adapted to engage a similarly configured helical groove 6a formed in the inner peripheral surface of a hub 6b connected to the auxiliary lever 6.
  • the Bowden cable 7 for actuating the brakes includes a tension cable or wire 7a having one end connected to the main brake lever 4 and the opposite end connected to the linkage of a caliper-type brake assembly, not shown.
  • the cable is also provided with a sheath 7b in which the wire 7a is slidably mounted, the end of the sheath abutting the face of the hub as at 7c, whereby the tension in the Bowden cable maintains the hub 6b against the front face of the housing 1 as shown in FIG. 3.
  • the helical cam surface 1b causes axial movement of the hub against the end 7c of the cable sheath, to thereby apply a compressive force on the cable sheath 7b, flexing the sheath to react against the normally taut flexible cable 7a, whereby the relative movement between the sheath and cable causes the brake shoes to be applied to the rim of the bicycle wheel.
  • cam surfaces in the embodiment shown in FIGS. 2 to 4 are helical, it is contemplated that other cam configurations can also be employed to obtain the desired axial movement of the hub 6b against the end of the cable sheath upon rotation of the auxiliary lever 6. Accordingly, in the embodiment shown in FIGS. 5 to 7, an undulating or wave cam configuration 1c, 6c is employed, whereby the rotation of the lever 6 in either direction, as shown by the arrows in FIG. 7, will cause the axial movement of the hub.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Braking Arrangements (AREA)

Abstract

An auxiliary brake lever for actuating the brakes of a bicycle wherein the auxiliary brake lever is operable independently of the main brake lever.

Description

BACKGROUND OF THE INVENTION
A bicycle brake operating device having a main brake lever and an auxiliary brake lever wherein the auxiliary brake lever is operable independently of the main brake lever is known, as evidenced by U.S. Pat. No. 3,719,104 dated Mar. 6, 1973.
The auxiliary brake lever of the present invention functions in a similar manner; however, it is characterized by its simplicity of construction, having few moving parts; thus, not likely to get out of order even after long and continued use.
The auxiliary brake lever of the present invention comprises, essentially, a cam surface provided on the housing of the main brake lever, and a cooperating cam follower surface provided on the hub of the auxiliary brake lever, the configuration of the cam surface being constructed and arranged whereby rotational movement of the auxiliary brake lever imparts axial movement to the lever hub to thereby apply a compressive force on the cable sheath, flexing the sheath to react against a normally taut flexible cable and move the cable along the sheath to apply the brake shoes to the rim of the bicycle wheel.
DESCRIPTION OF THE DRAWINGS
FIG. 1 is a side elevational view showing the main and auxiliary brake operating levers mounted in operative position on a bicycle handle bar;
FIG. 2 is an exploded perspective view showing the details of one embodiment of the cam configuration provided on the main brake lever housing and the cam follower configuration provided on the hub of the auxiliary brake lever;
FIG. 3 is a fragmentary, side elevational view, partly in section, showing the inoperative position of the auxiliary brake lever;
FIG. 4 is a fragmentary, side elevational view, partly in section, showing the operative position of the auxiliary brake lever;
FIG. 5 is an exploded, perspective view showing the details of another embodiment of the cam and cam follower configuration provided on the main brake lever housing and auxiliary brake lever hub, respectively;
FIG. 6 is a fragmentary, side elevational view, partly in section, showing the auxiliary brake lever embodiment of FIG. 5 in the inoperative position; and
FIG. 7 is a fragmentary, side elevational view, partly in section, showing the auxiliary brake lever embodiment of FIG. 5 in the inoperative position.
DESCRIPTION OF THE PREFERRED EMBODIMENTS OF THE INVENTION
Referring to the drawings and more particularly to FIG. 1 thereof, a housing 1 is secured to the bicycle handle bar 2 by a suitable strap 3, the housing having the main brake lever 4 pivotally connected thereto as at 5. The auxiliary brake lever 6 is rotatably mounted on the front or nose portion of the housing 1 and is operative to actuate the bicycle brakes, through Bowden cable 7, when moved in the direction of the arrows, to be described more fully hereinafter. The location of the main brake lever 4 and auxiliary brake lever 6 relative to the handle bar 2 is such that the main brake lever is operable from the hand grips of the handle bar and the auxiliary brake lever is operable from the cross bar of the handle bar.
The details of the auxiliary brake lever are shown in FIG. 2, wherein the nose of the housing is provided with an outwardly extending cylindrical sleeve 1a having a helical cam surface 1b formed on the outer peripheral surface thereof. The cam surface 1b is adapted to engage a similarly configured helical groove 6a formed in the inner peripheral surface of a hub 6b connected to the auxiliary lever 6.
The Bowden cable 7 for actuating the brakes includes a tension cable or wire 7a having one end connected to the main brake lever 4 and the opposite end connected to the linkage of a caliper-type brake assembly, not shown. The cable is also provided with a sheath 7b in which the wire 7a is slidably mounted, the end of the sheath abutting the face of the hub as at 7c, whereby the tension in the Bowden cable maintains the hub 6b against the front face of the housing 1 as shown in FIG. 3.
In the operation of the auxiliary brake lever, when the lever 6 is actuated to cause rotation of the hub 6b, as shown in FIG. 4, the helical cam surface 1b causes axial movement of the hub against the end 7c of the cable sheath, to thereby apply a compressive force on the cable sheath 7b, flexing the sheath to react against the normally taut flexible cable 7a, whereby the relative movement between the sheath and cable causes the brake shoes to be applied to the rim of the bicycle wheel.
While the cam surfaces in the embodiment shown in FIGS. 2 to 4 are helical, it is contemplated that other cam configurations can also be employed to obtain the desired axial movement of the hub 6b against the end of the cable sheath upon rotation of the auxiliary lever 6. Accordingly, in the embodiment shown in FIGS. 5 to 7, an undulating or wave cam configuration 1c, 6c is employed, whereby the rotation of the lever 6 in either direction, as shown by the arrows in FIG. 7, will cause the axial movement of the hub.
It is to be understood that the forms of the invention herewith shown and described are to be taken as preferred examples of the same, and that various changes in the shape, size and arrangement of parts may be resorted to, without departing from the spirit of the invention or scope of the subjoined claims.

Claims (6)

We claim:
1. In a caliper-type brake operating system having a main brake lever pivotally connected to a housing, and an auxiliary brake lever wherein the auxiliary brake lever is operable independently of the main brake lever for operating the caliper brake actuating cable, the improvement comprising, said auxiliary brake lever being rotatably mounted on the main brake lever housing, cam means connected between the main brake lever housing and the auxiliary brake lever, whereby upon rotational movement of the auxiliary brake lever, the cam means imparts axial movement to the auxiliary brake lever to thereby actuate the brake cable.
2. In a caliper-type brake operating system according to claim 1, wherein the cam means comprises a cam surface provided on said main lever housing, and a cam follower surface provided on one end of the auxiliary lever cooperating with the cam surface on the housing.
3. In a caliper-type brake operating system according to claim 1, wherein the cam means comprises a sleeve extending between the main lever housing and one end of the auxiliary brake lever, a cam surface provided on said sleeve, a hub connected to said one end of the auxiliary brake lever, said hub being rotatably mounted on said sleeve, and a cam follower surface provided on said hub cooperating with the cam surface on the sleeve.
4. In a caliper-type brake operating system according to claim 3, wherein said sleeve is mounted on said housing, said cam surface being formed on the outer peripheral surface of said sleeve, and said cam follower surface being formed on the inner peripheral surface of the hub.
5. In a caliper-type brake operating system according to claim 4, wherein the cam and cam follower surfaces have helical configurations.
6. In a caliper-type brake operating system according to claim 4, wherein the cam and cam follower surfaces have undulating configurations.
US05/596,169 1975-07-16 1975-07-16 Auxiliary brake lever Expired - Lifetime US3974712A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US05/596,169 US3974712A (en) 1975-07-16 1975-07-16 Auxiliary brake lever
CA234,546A CA1039624A (en) 1975-07-16 1975-09-02 Auxiliary brake lever

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/596,169 US3974712A (en) 1975-07-16 1975-07-16 Auxiliary brake lever

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Publication Number Publication Date
US3974712A true US3974712A (en) 1976-08-17

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US05/596,169 Expired - Lifetime US3974712A (en) 1975-07-16 1975-07-16 Auxiliary brake lever

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4636004A (en) * 1983-08-12 1987-01-13 Neumueller Konrad Seat mounting for chairs, in particular swivel-type desk chairs
US4679460A (en) * 1985-02-02 1987-07-14 Yoshigai Kikai Kinzoku Kabushiki Kaisha Brake lever device
US4762018A (en) * 1983-04-25 1988-08-09 Toshinobu Yoshigai Brake lever device
GB2212889A (en) * 1987-11-30 1989-08-02 Kubota Ltd Walking operator type agricultural working vehicle having a finger lever
EP0338984A2 (en) * 1988-04-18 1989-10-25 Maeda Industries, Ltd. Bicycle brake lever assembly
US5050444A (en) * 1989-08-28 1991-09-24 Maeda Industries, Ltd. Bicycle brake lever assembly
US20060208548A1 (en) * 2003-04-10 2006-09-21 Stefano Liviero Device for adjusting the degree of preload of the springs in office chair mechanisms

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3719104A (en) * 1971-09-17 1973-03-06 Excel Ind Bicycle brake applying device
US3776061A (en) * 1972-06-14 1973-12-04 Yoshigai Kikai Kinzoku Co Ltd Brake apparatus for bicycle
US3861234A (en) * 1973-05-29 1975-01-21 Stelber Ind Inc Brake levers for bicycles
US3896680A (en) * 1974-07-08 1975-07-29 Billy D Shoemaker Twist-grip control for motorcycle clutch

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3719104A (en) * 1971-09-17 1973-03-06 Excel Ind Bicycle brake applying device
US3776061A (en) * 1972-06-14 1973-12-04 Yoshigai Kikai Kinzoku Co Ltd Brake apparatus for bicycle
US3861234A (en) * 1973-05-29 1975-01-21 Stelber Ind Inc Brake levers for bicycles
US3896680A (en) * 1974-07-08 1975-07-29 Billy D Shoemaker Twist-grip control for motorcycle clutch

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4762018A (en) * 1983-04-25 1988-08-09 Toshinobu Yoshigai Brake lever device
US4636004A (en) * 1983-08-12 1987-01-13 Neumueller Konrad Seat mounting for chairs, in particular swivel-type desk chairs
US4679460A (en) * 1985-02-02 1987-07-14 Yoshigai Kikai Kinzoku Kabushiki Kaisha Brake lever device
GB2212889A (en) * 1987-11-30 1989-08-02 Kubota Ltd Walking operator type agricultural working vehicle having a finger lever
GB2212889B (en) * 1987-11-30 1992-04-22 Kubota Ltd Walking operator type agricultural working vehicle having a finger lever
EP0338984A2 (en) * 1988-04-18 1989-10-25 Maeda Industries, Ltd. Bicycle brake lever assembly
EP0338984A3 (en) * 1988-04-18 1991-01-30 Maeda Industries, Ltd. Bicycle brake lever assembly
US5050444A (en) * 1989-08-28 1991-09-24 Maeda Industries, Ltd. Bicycle brake lever assembly
US20060208548A1 (en) * 2003-04-10 2006-09-21 Stefano Liviero Device for adjusting the degree of preload of the springs in office chair mechanisms

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Publication number Publication date
CA1039624A (en) 1978-10-03

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